Portable laptop computer



FIG. 1 is a front, top and right side perspective view of a portable laptop computer showing our new design, with the cover and display in opened position;

FIG. 2 is a rear, bottom and left side perspective view thereof; and,

FIG. 3 is a front, top and right side perspective view thereof, with the cover and display closed. 

The ornamental design for a portable laptop computer, as shown and described. 